m sprank Posted December 30, 2010 Author Share Posted December 30, 2010 Its the turbo not liking the FMIC. VF-40/46 are really pathetic when it comes down to it. Link to comment Share on other sites More sharing options...
SubaruFanatic Posted December 30, 2010 Share Posted December 30, 2010 decent spool maybe.. thats about all the vf40 has going for it when pushed. and thats not even really much to talk about. Its the turbo not liking the FMIC. VF-40/46 are really pathetic when it comes down to it. yes i agree that it does not like high boost pressure i am only running 15-17psi i use to push it past 19 but I see no need for it since it doesn't make much of a difference after about 17psi. also I want to keep from killing it Link to comment Share on other sites More sharing options...
m sprank Posted December 30, 2010 Author Share Posted December 30, 2010 20 is possible. but anything over 18.5 is killing it fast. Asking it to hit 18 with the FMIC might require a restrictor pill and a EBCS. Maybe as small as a 0.8mm pill. Which will certainly degrade turbo life. If you can get it to hit and hold 17-17.5psi with a FMIC you are fine. That is about all the VF-40/46 can do. Link to comment Share on other sites More sharing options...
SBT Posted December 30, 2010 Share Posted December 30, 2010 Mike - Good info. Stickied this one too. - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
SubaruFanatic Posted December 30, 2010 Share Posted December 30, 2010 20 is possible. but anything over 18.5 is killing it fast. Asking it to hit 18 with the FMIC might require a restrictor pill and a EBCS. Maybe as small as a 0.8mm pill. Which will certainly degrade turbo life. If you can get it to hit and hold 17-17.5psi with a FMIC you are fine. That is about all the VF-40/46 can do. ok i just recirculated my bov and switched my intake back to the stock and didn't make much of a difference besides not back-firing when i shift. I took it for a test drive and funny thing is if i give it 3/4 throttle it will hit around 19-20 and bounce back and forth but if I give it full throttle it will hold at about 15 then taper off to about 13psi.??? I have always had a problem with this turbo dropping around 13psi but why would it be different when I have it half throttle or full throttle. Link to comment Share on other sites More sharing options...
SBT Posted December 30, 2010 Share Posted December 30, 2010 ^Sounds like a tune issue to me - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
SubaruFanatic Posted December 31, 2010 Share Posted December 31, 2010 yea cause my car is tuned for a top mount not a front mount. Link to comment Share on other sites More sharing options...
m sprank Posted December 31, 2010 Author Share Posted December 31, 2010 Yes. When you make the change there are a few parameters that need adjusting. It is more than you would think. Thanks Dale. I am extremely proud to now own two Stickies here on the forum. Maybe I can someday make the "hall of fame", LOL. Link to comment Share on other sites More sharing options...
SubaruFanatic Posted December 31, 2010 Share Posted December 31, 2010 Yes. When you make the change there are a few parameters that need adjusting. It is more than you would think. Thanks Dale. I am extremely proud to now own two Stickies here on the forum. Maybe I can someday make the "hall of fame", LOL. yea im gettin my shit tuned by infamous. Link to comment Share on other sites More sharing options...
m sprank Posted December 31, 2010 Author Share Posted December 31, 2010 I tried to tune my FMIC on my own. I got close. In the end Shamar cleaned it up for me and taught me a thing or two. Leave it to the pros. I turn the wrenches, Shamar does the tuning. He is the "Infamous" in Infamous Performance and Tuning. Link to comment Share on other sites More sharing options...
SubaruFanatic Posted December 31, 2010 Share Posted December 31, 2010 I tried to tune my FMIC on my own. I got close. In the end Shamar cleaned it up for me and taught me a thing or two. Leave it to the pros. I turn the wrenches, Shamar does the tuning. He is the "Infamous" in Infamous Performance and Tuning. lol yes i turn wrenches i use to do it for a living but tuning no way i leave that to someone that knows computers. I know how to install not tune. And I am going to try and have him tune my car this weekend if he can Link to comment Share on other sites More sharing options...
m sprank Posted December 31, 2010 Author Share Posted December 31, 2010 I believe he is Vegas this weekend. His trip was postponed. He should be there right now. Link to comment Share on other sites More sharing options...
SubaruFanatic Posted December 31, 2010 Share Posted December 31, 2010 I believe he is Vegas this weekend. His trip was postponed. He should be there right now. damnit lol figures i have off this weekend Link to comment Share on other sites More sharing options...
m sprank Posted December 31, 2010 Author Share Posted December 31, 2010 Always something. Link to comment Share on other sites More sharing options...
Infamous1 Posted December 31, 2010 Share Posted December 31, 2010 I am still online, always on the grind.... Link to comment Share on other sites More sharing options...
SBT Posted January 1, 2011 Share Posted January 1, 2011 Get some sleep Mike... early to bed, early to rise, yada, yada, yada... And Happy New Year - may it be your best ever. - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
duffy94 Posted January 2, 2011 Share Posted January 2, 2011 hey guys anybody install a turbo xs rfl bov recently? i just installed one yesterday and in the kit there was nothing to block off the recirculation hose and showed nothing to do with it any ideas of what to do? can post pictures if necessary thanks, Mike. Link to comment Share on other sites More sharing options...
dr_sharp Posted February 5, 2011 Share Posted February 5, 2011 If on the other hand, you put on a valve such as the GFB Hybrid or Stealth FX in which you can alter the venting ratio, and 50% of the air is recirculated, then the mixture will not go as rich, and the chance that you will run into problems such as backfiring or loss of performance is proportionally less. The mixture will not go as rich as what? As rich as OEM or as rich as 100% atm? If the OEM is full recirc, how could anyone get compressor surge on an OEM valve? lol Link to comment Share on other sites More sharing options...
m sprank Posted February 6, 2011 Author Share Posted February 6, 2011 As rich as 100% VTA. Spring not opening. It is easy. Surge and creep are normal with VF-39's. Pain to try and get perfect sometimes. Sorry duffy, missed your post. Not sure, but I think you want to go 100% VTA. This is not recommended. But a pic would help. Link to comment Share on other sites More sharing options...
dr_sharp Posted February 6, 2011 Share Posted February 6, 2011 Spring not opening. It is easy. Surge and creep are normal with VF-39's. Pain to try and get perfect sometimes. Why would the spring not open under higher boost? lol Link to comment Share on other sites More sharing options...
m sprank Posted February 6, 2011 Author Share Posted February 6, 2011 Its not at higher boost that you normally get it. Its a lower boost levels. When the compressor and BOV spring are fighting each other. Mash the gas and the compressor wins. Link to comment Share on other sites More sharing options...
dr_sharp Posted February 6, 2011 Share Posted February 6, 2011 I guess I was under the impression that compressor surge can only occur upon letting off of the throttle. lol Link to comment Share on other sites More sharing options...
m sprank Posted February 6, 2011 Author Share Posted February 6, 2011 Nope. Ever been cruising in 5th (6th) at highway speeds and rolled on the throttle from 3000rpm to accelerate past another car? Hear a light "gobble" sound as you accelerate? Its surge. Not a big deal at light throttle, but its there. I have heard VF-39's wastegates flap too. Creeping under same conditions. Link to comment Share on other sites More sharing options...
dr_sharp Posted February 6, 2011 Share Posted February 6, 2011 Well, I hadn't heard that noise until recently... I guess that's the curse of stock turbo + FMIC? lol Link to comment Share on other sites More sharing options...
m sprank Posted February 6, 2011 Author Share Posted February 6, 2011 Yes. Stock turbo, FMIC and even aftermarket BOV's do it. Link to comment Share on other sites More sharing options...
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